LT1768是High Power CCFL Controller for Wide Dimming Range and Maximum Lamp Lifetime

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LT1768 - LT1768是High Power CCFL Controller for Wide Dimming Range and Maximum Lamp Lifetime

LT1768是Linear公司的一款LCD / CCD / OLED 偏置产品，LT1768是High Power CCFL Controller for Wide Dimming Range and Maximum Lamp Lifetime，本站介绍了LT1768的封装应用图解、特点和优点、功能等，并给出了与LT1768相关的凌力尔特元器件型号供参考。

LT1768 - High Power CCFL Controller for Wide Dimming Range and Maximum Lamp Lifetime

LT1768 - High Power CCFL Controller for Wide Dimming Range and Maximum Lamp Lifetime - Linear Technology（凌力尔特）

功能描述

The LT1768 is designed to control single or multiple cold cathode fluorescent lamp (CCFL) displays. A unique Multimode Dimming scheme* combines both linear and PWM control functions to maximize lamp life, efficiency, and dimming range. Accurate maximum and minimum lamp currents can be easily set. The LT1768 can detect and protect against lamp failures and overvoltage start-up conditions. It is designed to provide maximum flexibility with a minimum number of external components.

The LT1768 is a current mode PWM controller with a 1.5A MOSFET driver for high power applications. It contains a 350kHz oscillator, 5V reference, and a current sense comparator with a 100mV threshold. It operates from an 8V to 24V input voltage. The LT1768 also has undervoltage lockout, thermal limit, and a shutdown pin that reduces supply current to 65µA. It is available in a small 16-lead SSOP package.

特点

Ultrawide Multimode Dimming™ Range

Multiple Lamp Capability

Programmable PWM Dimming Range and Frequency

Precision Maximum and Minimum Lamp Currents Maximize Lamp Lifetime

No Lamp Flicker Under All Supply and Load Conditions

Open Lamp Detection and Protection

350kHz Switching Frequency

1.5A MOSFET Gate Driver

100mV Current Sense Threshold

5V Reference Voltage Output

The 16-Lead SSOP Package

应用

Desktop Flat Panel Displays

Multiple Lamp Displays

Notebook LCD Displays

Point of Sale Terminal Displays

以下列出了不同封装及包装形式的具体型号,并标出了直接在linear官网上订货的价格（美元）

器件型号	封装	温度	价格 (以 1 ~ 99 片为批量)	价格 (以 1000 片为批量)
LT1768CGN	SSOP-16	C	$4.70	$4.10
LT1768CGN#PBF	SSOP-16	C	$4.70	$4.10
LT1768CGN#TR	SSOP-16	C		$4.16
LT1768CGN#TRPBF	SSOP-16	C		$4.16
LT1768IGN	SSOP-16	I	$5.10	$4.50
LT1768IGN#PBF	SSOP-16	I	$5.10	$4.50
LT1768IGN#TR	SSOP-16	I		$4.56
LT1768IGN#TRPBF	SSOP-16	I		$4.56